[Dovecot] more dsync issues

[Jeff Gustafson]

	It hit another dsync snag. We have a script that executes a dsync
backup command to a remote host. No write should be happening on the
remote host (the backup host). The error is:

dsync-local(anonymous at domain.com): Error: remote:
dsync-remote(anonymous at domain.com): Error: Can't delete mailbox INBOX:
INBOX can't be deleted.
dsync-remote(anonymous at domain.com): Error: command MSG-SAVE failed
dsync-local(anonymous at domain.com): Error: read() from worker server
failed: EOF
dsync-local(anonymous at domain.com): Error: Unexpected reply from server: 
dsync-local(anonymous at domain.com): Warning: Mailbox changes caused a
desync. You may want to run dsync again.

	We're currently running 2.1.7 since > 2.1.8 causes a problem with our
webmail software. 

		...Jeff